“Downward compatibility” in Japanese
Short answer
Downward compatibility in Japanese is “上位互換性” (jouigokansei). Full meaning: downward compatibility, backward compatibility; upward compatibility, forward compatibility.
Other ways to say “Downward compatibility” in Japanese
後方互換性
kouhougokansei backward compatibility, downward compatibility
下位互換性
kaigokansei upward compatibility, forward compatibility; downward compatibility, backward compatibility
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